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The brick is pulled up an inclined plane. At what point does the brick have the greates amount of potential energy at the top of the inclined plane at the bottom of the inclined plane at the center of the inclined plane it doesn't have potential energy A B C D 6.7a Oil It produces carbon dioxide emissions It must be extracted out of the ground It is easily transported worldwide Crude oil spills happen on land and water What is the advantage to using a longer inclined plane? it takes as longer time to push the object up there is no advantage It takes more force to push the object up It takes less force to push the object up 6.9C Which system shows a transformation from chemical to electrical to light energy? Sun shining on a photovoltaic roof panel Coal burning in a power plant causes lights to light up a room A display of fireworks in the night sky An avalanche rolls down a steep mountain 6.5dDuring a science class experiment, a teacher placed a small amount of baking soda into 100 mL of vinegar.Which of the following would be the best evidencethat a chemical change has taken place? The liquid is colorless baking soda doesn't dissolve A gas is given off The baking soda dissolves bicyclist R bicyclist S bicyclist T bicyclist U 6.8d Based on the graph which bicyclist traveled at a constant speed the entire time? Which statement is true about using shorter, steeper inclined planes to lift an object? fewer lifters are needed and it will take more time More lifters are needed, and it will take less time. fewer lifters are needed and it will take less time Which pulley system requires the least amount of effort to lift the load? A B C D A B C D Photosynthesis is an example of chemical change none of the above physical change Cutting a log into pieces is an example of a chemical change. True False neither Burning coal is an example of both chemical change none of the above physical change Which inclined plane would give the user the best advantage by requiring the least effort/force when moving the object? B A C D Evidence of a chemical change when buring thermite is production of a gas a flame is visible and produces heat color change all of these When potassium chlorate is heated it turns to a liquid. This is an example of a physical change chemical change none of the above irreversible Which is a physical change? burning leaves baking bread chopping celery burning coal Which is a chemical change? copper oxidizing and turning green freezing fruit juice boiling water slicing a potato Dissolving sugar in water is an example of chemical change physical change a change in the state of matter A solid that forms as a result of a chemical reaction between two liquids is a precipitate solvent solute mineral |